查询词典 radioactive

However, some of the minerals contain xenon isotope s unlike those usually produced by radioactive decay of uranium

然而，有些含氙同位素的矿物并非如此，是由铀的放射性衰变产生的。

The immediate product of the radioactive decay of an element.

一种碱金属属的放射性元素，是锕瓦解的产物。

Atoms in a radioactive substance decay in a random fashion but at a characteristic rate.

原子的放射性物质衰变的随机方式，但利率的一个特点。

Beneath the Earth's crust lies the mantle which is heated by the radioactive decay of heavy elements.

地壳的下面是地幔，由于有重元素的放射衰变活动所以温度较高。

Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals.

人们通常用矿物中所发现的各种放射性元素的衰变率来计算地质年代。

Each element has at least one isotope with unstable nuclei that can undergo radioactive decay .

每个元素至少有一个同位素不稳定原子核可以进行放射性衰变。

Tp the time required for one-half of the atoms in a group of radioactive atoms to decay.

放射性药物radiopharmaceuticals是指药物的本身含有放射性核素，用于人体疾病的诊断与治疗的特殊药物。

Scientists now believe it is a combination of radioactive decay and tidal heating [ 59 ] [ 60 ] , as tidal heating alone is not enough to explain the heat.

科学家现在相信，这是放射性衰变和潮汐热 [59] [60]的组合，如潮汐热不足以解释热量。

Such superheavy elements are usually very radioactive and decay away almost instantly.

这种超重元素通常是具有非常强的放射性，并且几乎立即会发生衰变。

Chemistry also uses calculus in determining reaction rates and radioactive decay.

化学也使用演算在确定反应速率和放射性衰变。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。